<template>
    <div class="list" ref="wrapper">
      <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.currentCity}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper"
               v-for="item of hot"
                :key="item.id"
                @click="handleCityClick(item.name)"
          >
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area"
           v-for="(item,key) of cities"
           :key="key"
           :ref="key"
      >
        <div class="title border-topbottom">{{key}}</div>
        <div class="item-list">
          <div
            class="item border-bottom"
            v-for="innerItem of item"
            :key="innerItem.id"
            @click="handleCityClick(innerItem.name)"
          >{{innerItem.name}}
          </div>
        </div>
      </div>

      </div>
    </div>
</template>

<script>
  import Bscroll from 'better-scroll'
  import {mapState,mapMutations} from 'vuex'
    export default {
        name: "CityList",
      props:{
          hot:Array,
          cities:Object,
          letter:String
      },
      computed:{
        ...mapState({
          currentCity:'city'
        })
      },
      methods: {
        handleCityClick(city){
          this.changeCity(city)
          this.$router.push('/')
        },
        ...mapMutations(['changeCity'])
      },
      mounted(){
          this.scroll=new Bscroll(this.$refs.wrapper)
      },
      watch : {
          letter () {
            if(this.letter){
              const element=this.$refs[this.letter][0]
              this.scroll.scrollToElement(element)
            }
          }
      }
    }
</script>

<style lang="stylus" scoped>
  @import '~styles/varibles.styl'
  .border-topbottom
    &:before
      border-color #ccc
    &:after
      border-color #ccc
  .border-bottom
    &:before
      border-color #ccc
  .list
    position absolute
    overflow hidden
    top:1.58rem
    left:0
    right 0
    bottom 0
    .title
      line-height .54rem
      background #eee
      padding-left .2rem
      font-size .26rem
      color #666
    .button-list
      overflow hidden
      padding .1rem .6rem .1rem .1rem
      .button-wrapper
        float left
        width:33.33%
        .button
          text-align center
          padding .1rem 0
          border-radius .06rem
          margin:.1rem
          border:.02rem solid #ccc
    .item-list
      .item
        line-height .76rem
        padding-left .2rem
</style>
